Mailwasher Pro (3.3), paid version

I at one time had a "very aggressive" wildcard exp. or Filter in MW Pro, that automatically erased most e-mails >unless< from someone on Friends List or anyone mentioned in the Filters category.
I don't, however, recall how that filter or wildcard was phrased - kind of a *.* type rule; would anyone know how to create/word such a filter, and would it go in the Wildcards Filter Category, or where, precisely?
Presently have MW Pro 3.3 version.